Another statement I couldn't agree more with....I've talked to many trainers who train over it and have been fooled because their horses don't run on it like they train on it....and some of these trainers are good enough trainers that I trust their opinions when they tell me a horse will run big on the dirt based on how the horse is training on the dirt.....this just goes to show you that Polytrack has evereybody throw off when it comes to conventional wisdom of training horses....